One of my friends had been posting quotes from this book over on MeWe, so I got interested and got a copy of it myself. Admittedly, I don't read a ton of old Puritan writing, but maybe I should start reading more.
This book is divided into two main parts. The first part is a more general conversation about our enemy, the devil. The second half of this book is a very interesting breakdown of the different temptations that face Christians at different times of life. This makes sense as some of the struggles that face the young Christians may not be the same as those that challenge more mature questions. That being said, there are interesting overlaps as well even though they might manifest themselves slightly differently.
One great thing about Puritan literature is that they never pull any punches, and this is a powerful, highly quotable book. It is well worth your time.